Description: Lightmatter is the atmospheric, first-person puzzle game inside a mysterious experimental facility where the shadows will kill you. Watch your movements closely through the sprawling tunnels and rooms or be swallowed into the vast darkness. The game tells a sci-fi story about a maniac inventor who has created the ultimate power source called Lightmatter. Players must explore the facility in an attempt to discover the hidden plot, while facing challenging puzzles that require mastering different light sources to survive.